About PDFNinja.site
PDFNinja.site provides a complete suite of free PDF tools that work entirely in your browser. No file uploads, no accounts, no limits.
Our Mission
We believe that basic PDF operations should be free and private. Most online PDF tools require you to upload your files to their servers — that means your sensitive documents pass through someone else's infrastructure. We took a different approach.
How It Works
Every tool on PDFNinja.site runs 100% in your web browser using client-side JavaScript. When you select a file, it's processed locally on your device. The result is generated right there in your browser and downloaded directly to your computer.
This means your files never leave your device. There is no server processing, no temporary storage, and no risk of data exposure.
Available Tools
- Merge PDF — Combine multiple PDFs into one
- Split PDF — Extract or separate pages
- Compress PDF — Reduce file size
- Rotate PDF — Fix page orientation
- Watermark PDF — Add text watermarks
- PDF to Images — Convert pages to PNG/JPG
- Images to PDF — Combine images into a PDF
- Reorder Pages — Rearrange PDF pages
Technology
PDFNinja.site is built with modern web technologies including Next.js, pdf-lib, and PDF.js. These open-source libraries enable powerful PDF manipulation directly in the browser without any server-side processing.